<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>计算器</title>
	</head>
	<body>
		<table border="10" align="center" bgcolor="aquamarine" cellpadding="15" cellspacing="8">
			<caption>计算器</caption>
			<tr>
				<td colspan="4" bgcolor="antiquewhite"></td>
			</tr>
			<tr>
				<td>c</td>
				<td>/</td>
				<td>*</td>
				<td>-</td>
			</tr>
			<tr>
				<td>7</td>
				<td>8</td>
				<td>9</td>
				<td rowspan="2">+</td>
			</tr>
			<tr>
				<td>4</td>
				<td>5</td>
				<td>6</td>
			</tr>
			<tr>
				<td>1</td>
				<td>2</td>
				<td>3</td>
				<td rowspan="2">=</td>
			</tr>
			<tr>
				<td>&lt;-</td>
				<td>0</td>
				<td>.</td>
			</tr>
		</table>
	</body>
</html>
